Watch Sherlock Season 3 Episode 2 S3E2 The Sign of Three

Plot:Sherlock faces his biggest challenge of all - delivering a Best Man's speech on John's wedding day! But all isn't quite as it seems. Mortal danger stalks the reception - and someone might not make it to the happy couple's first dance. Sherlock must thank the bridesmaids, solve the case and stop a killer!MORE

Plot: Sherlock faces his biggest challenge of all - delivering a Best Man's speech on John's wedding day! But all isn't quite as it seems. Mortal danger stalks the reception - and someone might not make it to the happy couple's first dance. Sherlock must thank the bridesmaids, solve the case and stop a killer! LESS

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What was the cast's first memory of working on Sherlock? Find out!
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Season four begins with the mercurial Sherlock Holmes (Benedict Cumberbatch), back once more on British soil as Doctor Watson (Martin Freeman) and his wife Mary (Amanda Abbington) prepare for their biggest challenge yet:... Show More

Learn more: http://to.pbs.org/2foyetD | #SherlockPBS
What was the cast's first memory of working on Sherlock? Find out!
Subscribe to the PBS channel for more clips: https://www.youtube.com/user/PBS/feat...
Enjoy full episodes of your favorite PBS programs at pbs.org/video.
Like MASTERPIECE on Facebook: https://www.facebook.com/masterpiecepbs
Follow MASTERPIECE on Twitter: https://twitter.com/masterpiecepbs
Follow MASTERPIECE on Instagram: https://www.instagram.com/masterpiecepbs/
Official MASTERPIECE website: http://www.pbs.org/masterpiece/
Like PBS on Facebook: https://www.facebook.com/pbs/
Follow PBS on Twitter: https://twitter.com/PBS
Follow PBS on Instagram: https://www.instagram.com/PBS
Official website: http://www.pbs.org/
Get PBS merchandise: http://www.shoppbs.org/home/index.jsp
Season four begins with the mercurial Sherlock Holmes (Benedict Cumberbatch), back once more on British soil as Doctor Watson (Martin Freeman) and his wife Mary (Amanda Abbington) prepare for their biggest challenge yet: becoming parents. Sherlock will return in "The Six Thatchers" on January 1, 2017 on MASTERPIECE on PBS. Show Less